[BusyBox] rmmod problem with inline ASM

[Josh Malone]

Hello all,

I've discovered that busybox-1.00's rmmod doesn't want to unload a module 
that I've written with inline assembly.  The module is a fiq driver that 
currently, just flashes an LED on my arm board (and ADS board).

Debian's rmmod (really insmod) can load and unload this driver fine. 
Busybox insmod can load the driver and the driver works perfectly.  On 
unload, I get the message:

   adsdebian:~# rmmod fiq-example
   rmmod: fiq-example: No such file or directory

Although the driver is clearly still running and loaded:

   adsdebian:~# lsmod
   Module                  Size  Used by    Not tainted
   fiq-example              752   0 (unused)


If I don't link in the assembly (and comment out the fiq install, etc.), 
then busybox unloads the remainder of the module fine.  Also, a basically 
empty module that just contains (but doesn't install) the assembly won't 
unload, either.

Has anybody else had any problems with rmmod and assembly?  Esp. on arm?

Any thoughts appreciated.  I can post code if it would help - it's just a 
stipped-down example at this point.  Thanks.


-Josh


Joshua Malone                            Linux Engineer
Applied Data Systems                www.applieddata.net
434-244-9504                    jmalone at applieddata.net